Carbureter.



A. HGWARTH.

GARBURETER.

APPLICATION FILED SEPT. 29, 1913.

1,105,200. Patented 3111128, 1914,

W H AN I w an, J ll 21.7 i l 'I ENE-5555.-

ALBERT HOWARTE, '1 movmaac'e, scone iSLAND.

CARBURETER.

Specification. tr Izett'ersPatent.

To ZZZ whom may concern.-

Be itsknown that I; ALnEnrHowfaR'rr-I, a:- citizen soft-he United States," residing at? Providence, in .gth e icounty of Providence so elevation ofithe valve for the intake 0f,at--

nrospheric air, and o-fthe throttle valve,

andS-tat'eofRhode Island, have invented certain :new and useful Improvements in.

Carbure'ters, of which the following is a specification, reference being bad therein to the accompanying drawings.

My invention relates to 'carbureters for supplying gasolene vapor to motors and consists of the novel construction and com-; binations oftheseveral parts as hereinafter described and claimed. I

'My. improved ca-rbureter is characterized by an air'intake valve for the admission of atmosphericair and a throttle valve for discharging carbureted air to the engine for explosion, which valves are mounted on one? valve rod so as tooperat'e in unison,-

*to the same angular extent and without loss ofmotio-n; and also by adjustable means operated by a cam fixed on said valve rod for varying atwill the quantity of gasolen'e supplied to the carbureter.

In the accompanying drawing like reference'numerals indicate like parts.

Figure 1 is a front elevation of my im I proved-carburetor. Fig. 2 is a top plan View of the same. Fig. 3 isa view in front bothJmonnted fast on one valve rod, together with the conical cam fastened on said rod and adapted to, actuate the gasoleneregulator, tovary the amountof gasolene supplied to the motor. f Fig. 4 isa view, partly in top plan and partly in section on i nism set for limiting the movement of the gasolene-regulator. Fig. 5 is a View, partly together with the air tube in relation there to for the supply of primary atmospheric air to the gasolene so discharged into the carbureter.

In the drawings the reference numeral 1 indicates the casting which constitutes the bodyofthe carbureter. Ithas a general U- shape form, the upright portion designated as 2 being tubular and adapted to serve auxiliary means for the admission of atmospheric air whenever and to whatever degree the operator may desire; and the upright portion designated as 3. being tubular and adapted to conduct and discharge at will to the manifold of the engine the carbureted air to operate the several pistons of the, respective cylinders. .The tubular portion '3 has a tubular flange 4:, which -is internally screw-threaded.

The float chamber 5 is cup-shaped and serves to hold the gasolene supply. The

Patented July 28,1914, Application filed September 29,1913. serial-No. 792,411.

gasolene is representedtherein at alevel indicated by the dotted line 6. A circular disk 7, integral with the bodyl of the carburetor, serves as acover of the float chamber 5 and has a circumferential lip, as illustrated at 8 in Fig. 5. A vertical tube 9, having a cylindrical bore 10, extends down from thebottom of the U bend of the carbureter body 1 and is integral therewith, being. cast in one 1 piece with it. At the bottom of the float chamber is a circular opening, as shown in Fig. 5, and an annular flange l1.

A nut 12, having a tubular socket 13, which is screw-threaded, is provided with a closed bottom. It has its upper end tapered or cone-shaped to fit in the circular opening in the bottom of the float chamber 5, and by means of its screw-threaded bore it engages with the screw-threaded cylindrical surface '14: of the tube 9, thus holding the float chamber 5 firmly in position and bringing the top edge of said chamber into closure with the circular lip 8 of the disk or cover 7 of carbureter body 1. The inner annular edge of the upper end of the nut or cap 12 is tapered or cone-shapedand soditted and held in the circular openingin the bottom of the float chamber 5 as to form therewith a gasolene-tight joint. A cup-shaped floatj15 is mounted in the chamber 5 in the well-known manner and has a central circular opening 16 'for'the passage of the tube 9 therethrough. At the upper end of the bore 10 of the tube 9 there is a gasolene-discharge orifice 17, which is shown open in F ig. 6 and closed in Fig. 7. The gasolene level 6 is maintained in the float chamber 5 just below the upper surface of this gasole'ne-discharge means 17, as represented in Fig. v

A gasolene-regulator 18 may be conical,

or may be flattened on one or more sides, or made with any point suitable for the purpose,'as heretofore used in the art, and'is adapted to fit into the gasolene-discharge orifice 17 more or less as desired, to permit or prevent the flow of gasolene up through the orifice 17. from the gasolene chamber 5 into the carburetor. The gasolene from the float chamber 5 flows through the feed openings 19,19, into the bore of the tube 9. The gasolene-regulator 18 extends down from a cylindrical rod .20, which may be integral therewith and which near its upper end passes slidingly through an opening made therefor in the upper portion of the U- body 1 of the carbureter.

A valve rod 21 is rotatably mounted in twotubularabosses 22, 22', which are integral with and extend from thetubes 3 and 2, respectively. A circular disk 23 serves as a throttle valve and when closed, as seen in Fig. 2, fits in the tubular portion 3 of the carbureter body 1. The disk 23 is fastened in position upon the valve rod 21 by screws 24.

An intake valve 25 for the admission of atmospheric air when and in quantities deand fastenedthere by a set screw 29, which passes through a boss 30 of said lever arm into holding contact with the -'valve rod 21. A throttle rod 31 i mounted upon the lever arm by a-pivot 32'and is operated by a connecting lever (not shown). At the opposite end of the lever arm is a flange 33, through which a set screw passes to contact with a projection or lug 35 extending from the tubular portion 2 of the carbureter body 1.

A cam 36 has the form of atruncated cone and its two ends 37, 38, are parallel to each other. This cam 36 has a straight bore, which is eccentrically located lengthwise of the cam, as illustrated in Figs 5 and 6, and through that bore the valve rod 21 passes and is fastened therein by the set screw 39. One side or face of the conical cam 36 is squared off, as shown at 40. That radius of the cam 36 which is shown horizontally in 5 and perpendicularly in Fig. 6 is the shortest radius, and the other radii of said cam increase regularly in length from said minimum radius for about 135 therefrom.

A rocker arm 41 has a rearwardly bent extension 42, provided with a screw-thread ed bore at the corner of said arm,through which bore a screw-threaded rod 43 passes engageably, so that the rocker arm 41 can have a limited oscillation on the screw rod 43, as can be seen by comparing Figs. 5 and 6. A finger 44 is mounted .on the extension 42 of the rocker arm 41 by means of a pivot 45. The finger 44 has a rounded outer end 46, which is bifurcated, as shown at 47, to engage loosely the cylindrical rod 20 in the two bosses or projections 51, 52. The projection 52 is horizontally sawed or split, as shown at 53 in Fig. 1, and a screw 54, pinching said split boss 52, serves to .hold the screw rodi43 with suflicient friction so that it will keep its place when adjusted. The screw rod 43 is turned by the head 55, op-

erated by hand, and a blind nut 56 at the opposite end of the screw rod 43 also serves to secure said screw rod in its adjusted position. p

A screw 57, having a knurled, head 58, passes through the upper end of the rocker arm 41 and its inner end bears against the conical cam 36. v A curved tube 59 (hereinafter called the primary air tube) has its upper end always open to the outer atmosphere, just beneath the valve rod 21, as seen in Fig. 2, and its lower end is always open and is in contact with the edge of the gasolene-discharge orifice 17, as seen in Figs 5 and 7.

The operation of my improved carbureter is as follows. .Gasolene. is supplied in any usual manner to the float chamber 5, and maintains therein a constant level, as shown at 6, which level is just below the upper edge of the gasolene discharging orifice 17. The gasolene is admitted to the carbureter from the float chamberby the rise of the gasoleneregulator 18 from its closed position in the valve seat 17, shown in Fig. .7, to its open position shown in Fig. 6. The engine suction then draws up through the opening or gasolene-discharge 17 into the U-bend or lower portion of the carbureter body a small jet of gasolene, and the primary atmospheric air, rushing down the primary airtube 59, as indicated by the arrow 60, strikes with great force this jetting gasolene, which passes up in the opening (while the gasolene-regulator 18.is in its elevated position illustrated in Fig. 6.) This gasolene, so discharged, is seized by the air-current and dashed against the inner surface of the U- bend of the carbureter body 1, opposite to the lower end of the primary air tube 59, and is thus dissipated into a fine spray and drawn up into the cylinder by the piston suction of the engine.

amazes Therod 31, pulledibytheoperator: in the open,1 as: determined by the extent of the of the carbureter.

. bureter-discharge are all controlled by the throw. ofthe lever arm 28, at-the will of the operator. In such" closed position it is seen that the gasolene-regulator 18 fills the orifice 17 of thegasolene discharge and the throttle valve 23 i horizontal and fully closes the tubular portion 30f the carbureter. At that time the air-admission valve 25 is also horizontal in the tubular portion 2 the adjacent air-spaces. at the two bent ends-,- which are'shown in Fig. 2; thus'allowing at. all times free access of atmospheric air to the bottomof the U-bend of the carbureter and to the gasolene-discharge orifice 17. In this closed position the rocker arm 41 stands perpendicularly. as seen in.

F ig. 5, and the inner end of the screw 57 abuts the cam 36 in line with the shortest radius. of said cam. The finger piece/4C4: at this time extends horizontally and by its bifurcated end 46, 47, engaging in the annular groove 48.0f the cylindrical rod 20, crowds thesaid rod and the gasolene-regulator 18 into the closed position in the gasolene-discharge orifice 17, as shown in Figs. 5 and' 6, under. the force of the spring 19. When, however, the throttle rod 31 is drawn by the operator in the direction of the arrow 61, the valve rod 21 is oscillated from the o sition shown in ,Fig. 5 to the position shown in Fig. 6 (or to some less extent, according 'to the length ofthe 'pull of the throttle rod 31-), and consequently, the increasing radial dimensions-of the cam 36 causes said cam to push outwardly, more and more, against the inner ,end of the screw 57 and so rocks (or, rather, oscillates) the screw rod 43, to a limited extent, thus lifting the gas0leneregulator 18 and its'rod 20, against the ten- Fig. 6. This single oscillation of the valve rod 21 moves to the same degree the throttle valve 23, the air valve 25 and the cam 36, all of which are fastened to said valve rod, as'shown in Figs. 2 and 3. The resultis that the valves 23 and 25 the cam 36 and the gasolene-regulator 18 operate in unison, and maintain constantly the same proportional relations with one another. Thus the airadmission, the gasolene feed and the carone operation of the throttle rod 31 in one direction to open and in the opposite direction to-close, and always without any lost motion.

In previ'ouslcarbureters of the class to which my said invention belongs, the operat- The primary air tub'e' 59, however, is permanently open, as also suchloosely cooperating parts there isnecessarily a considerable lost motion, with the accompanying disadvantages. In my construction'there is no. lost motion and all connections are positive-and accurate and rigidly set and maintained'in their adjusted and proper mutual relations.

The device to varyat will the quantity of gasolene to be fed to the carbureter is regulated, adjusted and set by turning the head 55 of the screw-rod 43. This rod is screwable in the fixed bearings or'bosses 51, 52, and causes by its turning the rocker arm 41 to travel on said threaded-rod in a nut-like manner. But as the. cylindrical-rod 20 is confined to a. linear-movement in a perpendicular dlrection. only, such travel or movement of the rocker arm 41' upon thesorew speed which he chooses. The nearer the larger end of the conical cam. 36 the inner end of the screw 57 is so set, the larger is the circumference of the conical cam against which the screw bears and consequently the greater is the outward tipping movement of the rocker arm 41 pivotally on the screw rod 43 and therefore the higher is the tilt .of the finger piece 44 and the elevation of the gasolene regulator 18 and its rod 20,. all

as exhibited in Fig. 6. Thus the requisite increase of the gasolene-supply to the. car.- bureter is regulated and maintained. But if it is desired to diminish the amount of gasolene supplied to the proportionate supply of air given by the air-admission valve 25, the operator turn the head 55 of the screw rod 43 by hand so as to move the rocker arm 41 on said rod toward the small end of the conical cam 36 to the proper position where the circumference of said camis less. The consequence is that the angular tilt of the finger piece 4 1 is decreased and the cylindrical rod 20 and its connected gasolene-regulator 18 are thereby moved downward and so diminish the amount of the gasolene supply to the carbureter.

It is to be understood in the proper use of my improved 'carbureter'the gasolene' regulator is never closed entirely, for there must always be a sufiicient gasolene supply 'ing lever h'asbeen connectedto the various =valves and gasolene-sup'plying' means by toggle joints, gears,or other mechanical loosely-connected devices, but in the use: of

to carburet the constant supply of primary air which passes down through the always open air-tube 59'. However, there can be no actual discharge of gasolene into the carbureter until engine action is established to suck up'gasolene, because the gasolene-level 6 is' always below the upper edges of the gasolcne-discharge orifice 17. The gasoleneregulator 18 is therefore always set (by the screws 4.3 and 57) to such a position as immediately to respond to the cranking action in starting the motor or to the regular piston suction, but in a low position. By opening the throttle valve 23 and the air-admissionvalve 25 by means of the throttle rod 81, more air is admitted to the carburetor and an increased supply of gasolene is allowed,

which is always proportionate to the increase of the air supplied through the tube 2 by the opening of the valve 25.

I claim as a new and useful invention and desire to secure by Letters Patent 1. In a carbureter, the combination of a rocker shaft mounted in supports ;'means for rocking said shaft; a throttle valve fas-' tened on said shaft;-an air-admission valve fastened on said shaft; a gasolene-supply chamber; a gasolene-regulator discharging into the carbureter; a valve seat for the throttle valve; a valve seat for the air-admission valve; a fixed rod mounted in supports; an adjusting arm movable along said rod; a cam on the rocker shaft; and means .from the adjusting arm in contact with said cam adapted to vary the gasolene-supply to the carbureter.

2. In a carbureter, the combination of a adjustable thereon; and regulable means intermediate said bent lever and gasolene-supply regulator adapted to open to a predetermined degree the gasolene-supply regulator against the pressure of said spring.

3. In a carbureter, the combination of a carbureter body; a throttle valve; a valve seat for the throttle valve; an air-admission valve; a valve seat for the air-admission valve; a receptacle for gasolene; a gasolenesupply regulator; a rocker shaft; means to rock said shaft; a spring normally closing the gasolene-supply regulator; an eccentrically mounted cam fastened on the rocker shaft; a screw rod mounted parallel to the rocker arm; an arm mounted by a screw thread on the screw rod; an adjusting screw .rotatably in said tubes diametrically thereof; a' lever arm fastened upon one'end of said valve rod; a pull rod pivotally connect-f ed with the lever arm at the outer end thereof; a circular throttle valve fastened upon .the valve rod adapted to open or close at will one of said tubes; an air-intake valve fastened upon said valve rod and always extending in the same plane as the throttle valve, which air-intake valve has aperiphery consisting in part of a true are and the.

remainder consisting of a straight line or chord of said arc and is adapted to partially close or open at will the other of said tubes; and a gasolene-supply regulator opening into the U-bend of the carbureter adjacent to the inner ends of said tubes.

5. In a carbureter for supplying gasolene to a motor, the combination of a carbureter body comprising two parallel tubes opening therefrom; a valve rod rotatably mounted in said tubes diametrically thereof; a lever arm adapted to rock the valve rod; a throttle valve fastened on the valve rod and adapted to open and close at will one of said tubes; an air-admission valve fastened on the valve rod and adapted to partially open or partially close at will the other of said tubes; a cam fastened on the valve rod and rotatable therewith; a chamber for containing gasolene; a gasolene-supply regulator; a spring normally pressing said regulator on the upper end thereof; a pivotally'mounted rocker arm; a screw mounted in the rocker arm and in contact at its inner end with the cam; and a finger piece pivotally mounted upon the rocker arm and having a longitudinal slot at its outer end extending into an annular groove near the top of said regulator.

6. In a carbureter for supplying gasolene to a motor, the combination of a carbureter body comprising two parallel tubes opening therefrom; a valve rod rotatably mounted in said tubes diametrically thereof; a lever arm adapted to rock the valve rod; a throttle valve fastened on the valve rod andadapted to open or close at will one of said tubes; an air-admission valve other of said tubes, a chamber for con-Q .taining gasolene; a gasolen'e-supply regulator; a spring for pressing downward the gasolene-supply regulator; av cam having the shape of a cone frust-um mounted fast on the first named valve rod a screw rod mounted and longitudinally movable in sup ports extending from said parallel tubes;

an arm having a screw-threaded bore mounted movably on said screw rod byengagement therewith; a swiveling finger mounted pivotally atone end on said arm and loosely engaging the upper end-of the gasolene-supply regulator; and an v adjust; ing screw mounted in the said arm and hav-" ing its inner end in contact with the conical surface of said cam;

*7. In a carburetor, the combination of a carbureter body comprising two parallel tubes opening therefrom; a valve rod ro-' tatably mounted in said tubes diametrically thereof; a lever armgadapted to rock the valve rod; a throttle valve fastened on the valve rod and adaptedto open or close at will one of said tubes; an air-admission valve fastened on the valve rod and adapted to partially open or partially close'at will the other of said tubes; a. chamber for containing gasolene; a gasolene-supply regu-; l'ator adapted to discharge gasolene by the suction of the motor; a spring for pressing downward said regulator; a cam having the shape of a cone frustum mounted fast on the first named valve rod; an arms; a rod on which .said arm is loosely mounted; means for imparting a movement to said arm along said rod and means operable by said cam and arm arranged to vary at will the rise of the 'gasolene-supply regu- 'lator.

8. In a carbureter for supplying 'gasolene to a motor, the combination of a carburetor body comprising two parallel tubes opening therefrom; a valve rod rotatably mounted in said tubes diametrically thereof; a lever arm adapted to rock the valve rod; a

throttle valve fastened on the valve rod and adapted to open or close at will pne of said tubes; an air-adrnission valve fastened on the valve rod and adapted topartially open or partially close at will the othenof said tubes; a chamber for containing gasolene;

a gasolene-supply regulator; a spring for pressing downward said/ regulator; a cam having the shape of a cone frustum and also a' straight longitudinal bore which is eecentrically located therein which cam is mounted by said bore upon the first named valve rod and fastenedin positionv thereon;

a screw rod mounted and longitudinally.

movable in fixed supports; a rocker arm having a screw-threaded bore and mounted on saidserew rod by engagement therewith; a swiveling finger mounted pivotally at one end on said rocker arm and loosely engageable at its opposite end with an annular groove in the neck of said regulator; and an adjusting screw mounted in the rocker arm and having its inner end in contact with the conical surface of said cam.

In. testimony whereof I afiix my signature in presence of two witnesses.

A ALBERT HOWARTH.

Witnesses: i a

B'ERrHA S. FURLONG,

ARTHUR P. J omvsoN. 

